Would it be possible to add an option in advanced preferences that would add a bypass channel to foobar audio_chunk interface skipping DSP chain and Volume control?

The idea is that this channel should directly deliver unchanged sound data to output device (like WASAPI or ASIO) without going into DSP and Volume Control chain. This way it will be possible to add true DoP mode without needing to resort to ASIO or WASAPI Proxies.

I've no idea about the innards of Foobar so if this is against any TOS or policy I'm sorry and please any admin move it to the bin or delete it. Ditto if it belongs in another sub forum.

Pity it is not possible, it could have been the first and only free DSD player for Windows, much like MPD in the Linux world. There are a few players out there capable of DSD (DoP or DSD over ASIO) but all are commercial products.